Program for timed locking/unlocking of folders?

[Goosio]

This program must exist but I can't find it. It's not complicated: I just want a program that will let me lock folders now, and automatically unlock them for me at a date/time of my choice. Any ideas? Many thanks in advance!

 

[GGJstudios]

Can't "lock" folders in Snow Leopard
Password protect folders
Password Protect Folders
How do i password protect a folder?
Is there a way to password protect access to a folder?
How do I make a folder private?